Mayor Mike needs lessons on when to shut his yap -- like when he's galli vanting around the globe and is suddenly moved to bash a key part of the US government, using crude hyperbole. "You look at who we're electing to Congress, to the Senate," the mayor said in Hong Kong last week, days after the midterm elections. "They can't read." He went on: "I'll bet you a bunch of these people don't have passports. We're about to start a trade war with China if we're not careful here, only because nobody knows where China is." Some folks, understandably,...